Knowles v. IowaKnowles v. Iowa
delivered the opinion of the Court.
An Iowa police officer stopped petitioner Knowles for speeding, but issued him a citation rather than arresting him. The question presented is whether such a procedure authorizes the officer, consistently with the Fourth Amendment, to conduct a foil search of the car. We answer this question "no.”
Knowles was stopped in Newton, Iowa, after having been clocked driving 43 miles per hour on a road where the speed limit was 25 miles per hour. The police officer issued a citation to Knowles, although under Iowa law he might have arrested him. The officer then conducted a foil search of the car, and under the driver’s seat he found a bag of marijuana and a “pot pipe.” Knowles was then arrested and charged with violation of state laws dealing with controlled substances.
Before trial, Knowles moved to suppress the evidence so obtained. He argued that the search could not be sustained under the "search incident to arrest” exception recognized in
United States
v.
Robinson,
Based on this authority, the trial court denied the motion to suppress and found Knowles guilty. The Supreme Court of Iowa, sitting en bane, affirmed by a divided vote.
The State contends that Knowles has challenged Iowa Code’s
In
Robinson, supra,
we noted the two historical rationales for the “search incident to arrest” exception: (1) the need to disarm the suspect in order to take him into custody, and (2) the need to preserve evidence for later use at trial.
We have recognized that the first rationale — officer safety — is “‘both legitimate and weighty,’”
Maryland
v.
Wilson,
This is not to say that the concern for officer safety is absent in the ease of a routine traffic stop. It plainly is not. See
Mimms, supra,
at 110;
Wilson, supra,
at 413-414. But while the concern for officer safety in this context may justify the “minimal” additional intrusion of ordering a driver and passengers out of the car, it does not by itself justify the often considerably greater intrusion attending a full field-type search. Even without the search authority Iowa urges, officers have other, independent bases to search for weapons and protect themselves from danger. For example, they
Nor has Iowa shown the second justification for the authority to search incident to arrest — the need to discover and preserve evidence. Once Knowles was stopped for speeding and issued a citation, all the evidence necessary to prosecute that offense had been obtained. No further evidence of excessive speed was going to be found either on the person of the offender or in the passenger compartment of the car.
Iowa nevertheless argues that a “search incident to citation” is justified because a suspect who is subject to a routine traffic stop may attempt to hide or destroy evidence related to his identity (e. g., a driver’s license or vehicle registration), or destroy evidence of another, as yet undetected crime. As for the destruction of evidence relating to identity, if a police officer is not satisfied with the identification furnished by the driver, this may be a basis for arresting him rather than merely issuing a citation. As for destroying evidence of other crimes, the possibility that an officer would stumble onto evidence wholly unrelated to the speeding offense seems remote.
In
Robinson,
we held that the authority to conduct a full field search as incident to an arrest was a “bright-line rule,” which was based on the concern for officer safety and destruction or loss of evidence, but which did not depend in every case upon the existence of either concern. Here we
It is so ordered.
Notes
Iowa law permits the issuance of a citation in lieu of arrest for most offenses for which an accused person would be "eligible for bail.” See
Iowa also contends that Knowles’ challenge is precluded because he failed to seek review of a separate decision of the Iowa Supreme Court, which affirmed his conviction for possession of drug paraphernalia in violation of a city ordinance. That decision, Iowa argues, resulted from the same search at issue here, rejected the same Fourth Amendment challenge Knowles now makes, and, under principles of res judicata, bars his present challenge. Even if Knowles’ failure to seek certiorari review of this decision could preclude his present challenge, Iowa waived this argument by failing to raise it in its brief in opposition to the petition for certiorari. See this Court’s Rule 15.2;
Oklahoma City
v.
Tuttle,